66839316 has 72 divisors (see below), whose sum is σ = 166813920. Its totient is φ = 20813184.

The previous prime is 66839281. The next prime is 66839327. The reversal of 66839316 is 61393866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 373315 + ... + 373493.

It is an arithmetic number, because the mean of its divisors is an integer number (2316860).

Almost surely, 2^66839316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66839316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83406960).

66839316 is an abundant number, since it is smaller than the sum of its proper divisors (99974604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66839316 is a wasteful number, since it uses less digits than its factorization.

66839316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 250 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 66839316 is about 8175.5315423525. The cubic root of 66839316 is about 405.8298606838.

The spelling of 66839316 in words is "sixty-six million, eight hundred thirty-nine thousand, three hundred sixteen".